CallSpin is a free web service that empowers end users to send and receive pre-recorded phone-calls to recipients they specify.  Founded in 2008, CallSpin has grown to include six websites:
ChristmasDialer.com – kids receive calls from Santa or the elf
BirthdayDialer.com – send a happy birthday song on their birthday.
WakeUpDialer.com – schedule a classy wake up call
CallMyLostPhone.com – to make your lost phone ring
ReminderDialer.com – set a phone call reminder for things you always forget
ComedyCalls.com – when you just want to make someone laugh